The Bivi is a micro vibration lure with a hollow body. Heavy weighting gives it great castability and a fast sinking speed, allowing anglers to effectively search an extensive area. It also has a great ability to maintain its swimming range, allowing the angler to fish from high ground. The free-moving 3mm tungsten ball inside creates a rattle effect while the lure moves from side to side, making this lure appeal to game fish like no other solid or metal lures can.